verifypostbarriers() verifyprebarriers() verifypostbarriers() asserts js debug shell on m-c changeset 599100c4ebfe without any CLI arguments at Assertion failure: isEnabled(), at gc/StoreBuffer.cpp My configure options are: CC="gcc -m32" AR=ar PKG_CONFIG_LIBDIR=/usr/lib/pkgconfig CXX="g++ -m32" sh ./configure --target=i686-pc-linux --enable-optimize --enable-debug --enable-profiling --enable-gczeal --enable-debug-symbols --enable-methodjit --enable-type-inference --disable-tests --enable-more-deterministic --enable-exact-rooting --enable-elf-hack --enable-stdcxx-compat --enable-warnings-as-errors --enable-signmar --disable-elf-hack --enable-js-diagnostics --with-intl-api=build --enable-ctypes --disable-shared-js --enable-jemalloc --enable-gcgenerational --with-ccache --enable-threadsafe <other NSPR options> autoBisect shows this is probably related to the following changeset: The first bad revision is: changeset: http://hg.mozilla.org/mozilla-central/rev/06f844b81f3d user: Brian Hackett date: Wed Nov 27 16:28:57 2013 -0700 summary: Bug 938124 - Add classes for use in IonBuilder thread safety analysis, r=jandem. (not sure if bug 938124 is entirely at fault here)

The testcase is doing the following: 1. Start verifying post barriers 2. Start verifying pre barriers 3. Finish verifying post barriers The problem is that pre barrier verification disables GGC, but post barrier verification relies on making use of the store buffer. I guess this combination is just not going to work. Here's a patch to disallow starting pre barrier verification while post barrier verification is ongoing.

Comment on attachment 8355241 [details] [diff] [review] bug952819-verify-nesting Review of attachment 8355241 [details] [diff] [review]: ----------------------------------------------------------------- I agree, there's no reason to ever want to do both at once. r=me ::: js/src/gc/Verifier.cpp @@ +455,5 @@ > return; > > + /* > + * The post barrier verifier requires the storebuffer to be enabled, but the > + * pre barrier verifier disables it as part of disabling GGC. Don't allow One space between sentences.

Should the opposite nesting (post during pre) also be disabled?